EP3825084A1 - Machine-outil portative, en particulier rainureuse ou scie circulaire, en particulier pour le traitement du bois - Google Patents

Machine-outil portative, en particulier rainureuse ou scie circulaire, en particulier pour le traitement du bois Download PDF

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Publication number
EP3825084A1
EP3825084A1 EP20198344.2A EP20198344A EP3825084A1 EP 3825084 A1 EP3825084 A1 EP 3825084A1 EP 20198344 A EP20198344 A EP 20198344A EP 3825084 A1 EP3825084 A1 EP 3825084A1
Authority
EP
European Patent Office
Prior art keywords
cutting
cutting tool
protective hood
tool
milling head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20198344.2A
Other languages
German (de)
English (en)
Inventor
Johannes Hirneise
Rigo Züfle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mafell AG
Original Assignee
Mafell AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mafell AG filed Critical Mafell AG
Publication of EP3825084A1 publication Critical patent/EP3825084A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G13/00—Cutter blocks; Other rotary cutting tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G13/00—Cutter blocks; Other rotary cutting tools
    • B27G13/02—Cutter blocks; Other rotary cutting tools in the shape of long arbors, i.e. cylinder cutting blocks
    • B27G13/04—Securing the cutters by mechanical clamping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B27M1/003—Mechanical surface treatment
    • B27M1/006—Mechanical surface treatment for preparation of impregnation by deep incising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G13/00—Cutter blocks; Other rotary cutting tools
    • B27G13/08—Cutter blocks; Other rotary cutting tools in the shape of disc-like members; Wood-milling cutters

Definitions

  • the invention relates generally to handheld power tools, in particular slot milling machines or circular saws.
  • the invention relates to hand-held machine tools for woodworking.
  • a groove milling machine includes, for example, a milling head that can be driven to rotate.
  • the milling head is, for example, essentially designed in the shape of a disk or cylinder.
  • several cutting elements such as indexable inserts, are arranged distributed over the circumference of the milling head.
  • An axis of rotation of the milling head is - if the milling head can be tilted, at least in an initial position - aligned in particular parallel to a workpiece surface on which a base, in particular a base plate, of the groove cutter rests during machining.
  • a base of the slot milling machine is placed directly on the workpiece surface or placed on a guide rail that rests on the workpiece surface.
  • the milling head can be tiltably connected to the base.
  • An axis of inclination can be arranged parallel to a machining or feed direction.
  • a groove with a rectangular cross-section is made by the milling head.
  • the groove is triangular in cross-section if the machining depth is set accordingly.
  • Such grooves are required, for example, in the post construction in timber construction.
  • a handheld power tool can be driven electrically, for example.
  • a hand machine tool is also called an electric hand tool designated.
  • a power supply cable and / or a battery can be provided.
  • the present invention relates to a groove milling machine for woodworking, comprising a milling head which can be driven to rotate and which is fitted with several cutting edges, in particular indexable inserts, the milling head having two axial ends and a radial outer circumference with respect to its axis of rotation, and wherein at least one first cutting edge, in particular indexable insert, is arranged at a respective axial end and axially mounted and / or wherein at least one second cutting edge, in particular indexable insert, is arranged on the outer circumference and is mounted radially.
  • a groove cutter according to claim 1 and in particular in that at least one third cutting edge, in particular an indexable insert, is arranged axially between the axial ends and is axially mounted.
  • chip lengths can occur which cannot be passed through a suction nozzle of the grooving or which, for example, cause them to become blocked.
  • the surface of the workpiece is processed by the third cutting edge in particular in such a way that, together with the processing of the other cutting edges, only smaller chips occur overall.
  • the third cutting edge is set up to slit, incise and / or incise the material of the workpiece, in particular before it is removed from a second cutting edge.
  • the material is weakened in a targeted manner before it is removed. This results in particularly short chips.
  • first, second and third cutting edges are mentioned here, it goes without saying that this only serves to facilitate reference with regard to the installation location and direction of installation and, in particular, that a second and third cutting edge do not require a first cutting edge or second cutting edge.
  • a cutting edge of the cutting edge runs in particular transversely to the mounting direction of the cutting edge, namely transversely to the radial or axial direction.
  • At least one, in particular several or all, of the cutting edges can preferably be mounted in a detachable and / or exchangeable manner.
  • the cutting edge or the cutting edges are designed as indexable inserts.
  • the third cutting edge forms a precutter for a second cutting edge arranged downstream in the circumferential direction.
  • the material of the workpiece is specifically weakened before the second cutting edge hits.
  • the second cutting edge can thus mill through the material more easily. The result is significantly smaller chip lengths.
  • the third cutting edge is arranged offset in the circumferential direction relative to the second cutting edge.
  • the third cutting edge can in particular be mounted in such a way that one corner of the cutting edge protrudes radially.
  • the third cutting edge can in particular be arranged in a groove, in particular a circumferential groove.
  • a fastening element for the cutting edge can generally be exemplary be actuated through a recess or hole in the body of the milling head.
  • the third cutting edge can be arranged, for example, in the area of a running surface of the milling head and / or protrude radially from this.
  • the third cutting edge can divide the chips into transportable lengths.
  • the invention relates to a hand machine tool, in particular for woodworking, in particular a groove cutter or circular saw, comprising a movable cutting tool, in particular a milling head or a saw blade.
  • a handheld power tool according to claim 5, and in particular in that a warning light is provided which is set up to light up or flash as long as the tool is moving, in particular also when the power supply to a motor of the handheld power tool is interrupted.
  • the warning light shows the user the potential danger of a cutting tool in motion via optical signals, even when the motor is not active. If, for example, the cutting tool continues to run, for example, after turning off a main switch, the movement is still reliably displayed. This improves work safety in a simple manner.
  • the handheld power tool comprises a movement sensor for detecting a movement, in particular a rotation, of the cutting tool.
  • a movement of the cutting tool is recognized in a simple manner and the warning light can be activated accordingly.
  • the sensor can, for example, interact with a rotor shaft to detect its movement.
  • a sensor can, for example, directly detect the movement of the cutting tool.
  • a movement sensor can detect a movement, for example by means of a magnet that is movement-connected to the tool and / or a motor shaft, in particular a ring magnet.
  • the sensor can for example comprise a Hall sensor.
  • the warning light can preferably be arranged on the outside of the handheld power tool and / or on a side thereof facing the user of the handheld power tool during a machining process. According to one embodiment it is provided that the warning light is arranged on an engine housing.
  • the warning light can in particular be set up to light up or flash independently of a main switch or operating switch of the handheld power tool as long as the tool is in motion.
  • the warning light indicates an actual movement, in particular rotation, of the cutting tool and in particular not just whether the cutting tool is currently being driven by the motor.
  • the warning light can be set up to light up or flash independently of a power supply to the handheld power tool, ie even when the machine is switched off insofar as the power supply to the motor is interrupted. Since such a lamp does not usually require a lot of electricity, the electricity required for the warning lamp can be used for example, can be generated by the movement of the cutting tool, for example via a dynamo.
  • a third aspect of the invention relates to a slot milling machine or hand-held circular saw, in particular for woodworking, comprising a cutting tool that can be driven to rotate, in particular a milling head or saw blade.
  • a grooving cutter or hand-held circular saw according to claim 8, and in particular in that a movable protective hood is provided for the tool, which is designed to cover the cutting tool, in particular exclusively, from the side during a cutting process.
  • movable protective hoods for a grooving cutter or hand-held circular saw which cover the cutting tool as long as the grooving or hand-held circular saw is not resting on a workpiece.
  • Such protective hoods cover the cutting tool in particular in the radial direction and often also laterally.
  • the protective hood can in particular be pivoted about an axis of rotation of the cutting tool.
  • Such known protective hoods are also referred to as pendulum hoods.
  • Such protective hoods have the following disadvantages in particular. Firstly, when a fold or a step is introduced into the workpiece, the cutting tool is essentially completely free at the side. Secondly, when a groove is made above the workpiece surface, the cutting tool is free to the side, especially when using the groove cutter or hand-held circular saw is designed to be inclined and a corresponding lateral freedom of movement for the inclinable part of the grooving machine or hand-held circular saw must be ensured.
  • a movable protective hood is now provided to cover the side of the cutting tool during the cutting process. Work safety is thus increased, since accidental contact with the cutting tool by the user from the side is reliably avoided.
  • the movable protective hood for covering the side can in principle be provided, for example, in addition to a movable protective hood of the known type described above or also independently thereof, in particular as a single protective hood.
  • the side protective hood can also cover the milling head in the idle state and / or in a closed position and thus protect the user even better from inadvertently reaching into the milling head, also and in particular in connection with a known pendulum hood.
  • the movable protective hood can be pivoted transversely to the axis of rotation of the cutting tool and / or about a pivot axis which is spaced apart from the axis of rotation of the cutting tool.
  • a pivot axis of the protective hood can preferably be arranged in front of the cutting tool in the cutting direction or machining direction.
  • the movable protective hood can have a ramp which is designed to deflect the movable protective hood from a rest position or closed position when the cutting tool moves into the workpiece.
  • the movable protective hood is in contact with the workpiece, in particular with a surface, during a cutting process of the same, is held.
  • the protective hood can generally, for example, be biased into a rest position, in particular by means of a spring.
  • the preload or the spring can hold the protective hood in contact with the workpiece, for example, when the protective hood is deflected from a rest position, in particular by the workpiece.
  • a second movable protective hood in particular a pendulum hood, can be provided for the tool, with the second movable protective hood in particular being pivotable about the axis of rotation of the cutting tool and / or covering the cutting tool in the radial direction in the closed state.
  • the second movable protective hood corresponds in particular to a protective hood of a known type.
  • two independent protective hoods can therefore preferably be provided.
  • the protective hoods can in particular be opened separately from one another.
  • the protective hoods preferably always open so that the cutting tool is maximally covered.
  • a hand-operated groove cutter 10 is shown.
  • This comprises a milling head 12 which, in the state shown, is covered by protective hoods 14, 16.
  • the milling head 12 is in particular approximately a few centimeters wide, in particular at least 1 cm and / or at most 15 cm, in particular at most 12 cm.
  • the milling head 12 can be driven to rotate by a motor 18. Both the milling head 12 and the motor 18 are mounted on a base part 20 of the groove milling machine 10, which forms a base plate and which is pushed along a machining direction on a workpiece, not shown here, in order to make a groove in the workpiece.
  • a basically optional guide rail 22 is provided which is placed on the workpiece and on which the groove cutter 10 or the base part 20 is guided in the machining direction.
  • a preferred machining direction is indicated by arrows on the guide rail.
  • a connection 24 for a suction system and a handle 26 are particularly visible.
  • the guide rail 22 can preferably be fastened to the base part 20, in particular releasably. This makes handling of the groove cutter 10 particularly easy.
  • the guide rail 22 and the base part 10 or the groove cutter 10 can be firmly connected to one another, in particular form a unit.
  • a quick-release fastener can be provided for the connection between guide rail 22 and base part 20. As a result, the groove cutter 10 can be separated from the guide rail 20 with a single movement.
  • FIGS. 4 and 5 show the groove cutter 10 in an inclined position in different views.
  • Fig. 4 shows a side view.
  • the processing direction runs from left to right here.
  • Fig. 5 shows the slot milling machine 10 from the front, that is to say with a view opposite to the machining direction.
  • the machining direction is a preferred machining direction, but the groove milling machine 10 can in principle also be moved in the opposite direction.
  • the groove milling machine 10 is designed to be inclinable, i. H. an angle of the axis of rotation of the milling head 12 to the machining direction is adjustable.
  • an inclination mechanism 28 is provided, which mounts the milling head 12 so that it can be inclined relative to the base 20.
  • a desired angle of inclination can be selected using a scale that is not visible here.
  • a workpiece 30 is also indicated, on which the guide rail 22 and the groove cutter 10 rest.
  • a lower end 32 of a groove 34 introduced by the milling head 12 is indicated.
  • the shape of the groove 34 corresponds to the visible shape of the milling head 12 below the workpiece surface. The groove 34 is thus - with the geometry settings of the groove cutter 10 present here - triangular in cross section.
  • a crack indicator 36 is also visible, which indicates the milling head 12 a right end of the groove 34 in the machining direction.
  • the crack indicator 36 is slidably attached to the base 20 so that the indicated groove width is adjustable.
  • Fig. 6 the groove cutter 10 is shown enlarged in the area of the milling head 12, the protective hoods 14, 16 being deflected from their respective closed position so that the milling head 12 is freely visible.
  • This includes several cutting edges, which are designed as indexable inserts and are described in more detail below.
  • the milling head 12 comprises a plurality of first indexable inserts 70 which are arranged at one axial end of the milling head 12.
  • a first indexable insert 70 is visible.
  • a fastening element 72 for the first indexable insert 70 is screwed axially into the body of the milling head 12, the first indexable insert 70 is therefore mounted axially.
  • first indexable inserts 70 are also arranged and axially mounted. The first indexable inserts 70 produce lateral boundaries for the finished groove 34
  • the milling head 12 also includes a plurality of second indexable inserts 74, which are arranged on the outer circumference of the milling head 12.
  • two second indexable inserts 74 are visible, which are arranged at the same position in the circumferential direction on the milling head 12.
  • a fastening element 76 of the respective indexable insert 74 is screwed radially into a body of the milling head 12.
  • the second indexable inserts 74 are thus mounted radially. In particular, they create a base of the finished groove 34.
  • a third indexable insert 78 is provided, which is arranged in a recess 80 of the milling head 12 and mounted axially.
  • One corner of the indexable insert 78 protrudes radially from the circumferential surface of the milling head 12.
  • This corner is arranged in such a way that it pre-cuts the material of the workpiece before the indexable inserts 74 arranged downstream in the circumferential direction cut the material. This reduces the resulting length of chips generated in the workpiece material, which means that the chips can be removed more easily.
  • the milling head 12 is in Fig. 7 optional and in one of Fig. 6 different perspective shown.
  • An axis of rotation 82 is indicated by dashed lines, and a direction of rotation in the milling mode is indicated by an arrow 84.
  • FIG. 7 an access opening 86 for a fastening element, in particular a screw, for the third indexable insert 78 and for an actuating element, in particular a screwdriver, for the fastening element is visible.
  • the fastening element can thus easily be introduced axially and screwed in.
  • the corner of the third indexable insert 78 which protrudes from the recess 80 and cuts the material can be selected by loosening the fastening element and rotating the third indexable insert 78.
  • Fig. 8 the engine 18 is shown isolated.
  • an armature shaft 88 is visible, to which a ring magnet 90 is connected.
  • a sensor 92 is provided, via which a movement of the ring magnet 90 and thus a rotation of the armature shaft 88 can be detected.
  • the armature shaft 88 is connected to the milling head 12 and drives it.
  • the sensor 92 is connected by electrical lines (not shown here) to a warning lamp 94, which is set up to light up or flash as long as the cutting tool or the milling head 12, here together with the armature shaft 88, is rotating.
  • Fig. 9 the arrangement of the warning light 94 on the housing 95 of the engine 18 is shown.
  • the chosen perspective essentially corresponds to the one which is shown to a user of the groove milling machine 10 during a machining process. In doing so, the user particularly places his right hand on the handle 26.
  • the warning light 94 faces the user. Thus, the user has constant and reliable feedback on the state of movement of the milling head 12 and is warned of any danger arising therefrom.
  • Fig. 10 shows the groove milling machine 10 in a side view, that is to say with a viewing direction along the axis of rotation of the milling head 12.
  • the first movable side cover 14 and the second movable side cover 16 are shown deflected.
  • the first movable side hood 14 and the second movable side hood 16 are shown in a rest position in which they completely cover the milling head 12.
  • the first movable protective hood 14 is provided to laterally cover the milling head 12 during a machining process. It comprises a pivot axis 96, which is arranged at a distance from the axis of rotation of the milling head 12, here in front of the milling head 12 in the machining direction.
  • the first protective hood 14 comprises a spring, not visible here, which the first protective hood 14 into the position shown in FIG Fig. 1 shown closed position or in Fig. 10 biased downwards.
  • An opening direction of the first protective hood 14 is indicated by an arrow 98.
  • the first protective hood 14 is held in contact with the workpiece 30 by the spring preload against the opening direction or the arrow 98.
  • FIG Figures 4 and 5 A position of the first protective hood 14 during a machining process in contact with a surface of the workpiece 30 is shown, for example, in FIG Figures 4 and 5 visible. It can be seen from this that touching the milling head 12 by the user from the side in Fig. 5 from the left, is effectively prevented.
  • the first protective hood 14 comprises a ramp 100 on which the workpiece 30 can advantageously slide.
  • the construction and function of the second movable protective hood 16 corresponds in particular to a known protective hood.
  • the second movable protective hood 16 can be pivoted about the axis of rotation of the milling head 12, an opening direction being indicated by an arrow 102.
  • the second protective hood 16 is also pretensioned by a non-visible spring, so that the second protective hood 16 is closed in a rest position.
  • the second protective hood 16 covers the milling head 12 in particular in the radial direction.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Milling Processes (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
EP20198344.2A 2019-11-21 2020-09-25 Machine-outil portative, en particulier rainureuse ou scie circulaire, en particulier pour le traitement du bois Pending EP3825084A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019131529.8A DE102019131529A1 (de) 2019-11-21 2019-11-21 Handwerkzeugmaschine, insbesondere Nutfräse oder Kreissäge, insbesondere für die Holzbearbeitung

Publications (1)

Publication Number Publication Date
EP3825084A1 true EP3825084A1 (fr) 2021-05-26

Family

ID=72659145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20198344.2A Pending EP3825084A1 (fr) 2019-11-21 2020-09-25 Machine-outil portative, en particulier rainureuse ou scie circulaire, en particulier pour le traitement du bois

Country Status (2)

Country Link
EP (1) EP3825084A1 (fr)
DE (1) DE102019131529A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024119256A1 (fr) * 2022-12-06 2024-06-13 Irani Papel E Embalagem S.A. Dispositif de coupe pour système de résinage mécanique

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US29768A (en) * 1860-08-28 photo-litho
US947462A (en) * 1909-02-15 1910-01-25 Karl Jakob Spieth Woodworking-cutter.
US1664806A (en) * 1924-11-05 1928-04-03 Hermance Machine Company Cutter head for woodworking machines
DE1847158U (de) * 1961-09-30 1962-02-22 Stehle Werkzeug & Maschf Schneidwerkzeug fuer die holzbearbeitung.
US3817305A (en) * 1972-10-19 1974-06-18 Ferguson I Cutter tip
DE3936883A1 (de) * 1989-05-23 1990-12-06 Klaus Szonn Fraeskopf zur holzbearbeitung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US29768A (en) * 1860-08-28 photo-litho
US947462A (en) * 1909-02-15 1910-01-25 Karl Jakob Spieth Woodworking-cutter.
US1664806A (en) * 1924-11-05 1928-04-03 Hermance Machine Company Cutter head for woodworking machines
DE1847158U (de) * 1961-09-30 1962-02-22 Stehle Werkzeug & Maschf Schneidwerkzeug fuer die holzbearbeitung.
US3817305A (en) * 1972-10-19 1974-06-18 Ferguson I Cutter tip
DE3936883A1 (de) * 1989-05-23 1990-12-06 Klaus Szonn Fraeskopf zur holzbearbeitung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024119256A1 (fr) * 2022-12-06 2024-06-13 Irani Papel E Embalagem S.A. Dispositif de coupe pour système de résinage mécanique

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